Cryptographic Proof of Exchange: How We Use Ed25519 to Sign Every Transaction Before It Happens

When you use a cryptocurrency exchange, the flow is simple: you send coins to an address, and the service sends different coins back. But there's a gap. Between sending your deposit and receiving your payout, you're trusting the service completely. There's no contract, no proof, no verifiable commitment. The service could change the rate, swap the destination, or simply not pay out — and you'd have no cryptographic evidence of what was promised. We built a system that eliminates this gap. The pr